Vulnerability Details : CVE-2020-8517
An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.
Vulnerability category: Memory CorruptionInput validationDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2020-8517
Probability of exploitation activity in the next 30 days: 0.39%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 70 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-8517
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
[email protected] |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
[email protected] |
CWE ids for CVE-2020-8517
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: [email protected] (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: [email protected] (Primary)
References for CVE-2020-8517
-
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.html
Mailing List;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20210304-0002/
Third Party Advisory
-
https://security.gentoo.org/glsa/202003-34
Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
Mailing List;Third Party Advisory
-
http://www.squid-cache.org/Advisories/SQUID-2020_3.txt
Vendor Advisory
-
http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patch
Patch;Vendor Advisory
-
https://usn.ubuntu.com/4289-1/
Third Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.html
Mailing List;Third Party Advisory
Products affected by CVE-2020-8517
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*